Display screen with an animated graphical user interface



FIG. 1 is a front view of a first image in a sequence of a display screen with an animated graphical user interface showing my new design;

FIG. 2 is a second image thereof; and,

FIG. 3 is a third image thereof.

The appearance of the animated graphical user interface sequentially transitions between the images shown in FIGS. 1-3. The process or period in which one image transitions to another forms no part of the claimed design. The outermost broken line rectangle illustrates a display screen and forms no part of the claimed design. The remaining broken lines illustrate portions of the graphical user interface and form no part of the claimed design. 

CLAIM The ornamental design for a display screen with an animated graphical user interface, as shown and described. 